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[v2,net-next,5/6] ethernet: constify eth_get_headlen()'s @data argument

Message ID 20210313113645.5949-6-alobakin@pm.me
State New
Headers show
Series skbuff: micro-optimize flow dissection | expand

Commit Message

Alexander Lobakin March 13, 2021, 11:37 a.m. UTC 
It's used only for flow dissection, which now takes constant data
pointers.

Signed-off-by: Alexander Lobakin <alobakin@pm.me>
---
 include/linux/etherdevice.h | 2 +-
 net/ethernet/eth.c          | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--
2.30.2
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Patch

diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index bcb2f81baafb..330345b1be54 100644
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -29,7 +29,7 @@  struct device;
 int eth_platform_get_mac_address(struct device *dev, u8 *mac_addr);
 unsigned char *arch_get_platform_mac_address(void);
 int nvmem_get_mac_address(struct device *dev, void *addrbuf);
-u32 eth_get_headlen(const struct net_device *dev, void *data, unsigned int len);
+u32 eth_get_headlen(const struct net_device *dev, const void *data, u32 len);
 __be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev);
 extern const struct header_ops eth_header_ops;

diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index 4106373180c6..e01cf766d2c5 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -122,7 +122,7 @@  EXPORT_SYMBOL(eth_header);
  * Make a best effort attempt to pull the length for all of the headers for
  * a given frame in a linear buffer.
  */
-u32 eth_get_headlen(const struct net_device *dev, void *data, unsigned int len)
+u32 eth_get_headlen(const struct net_device *dev, const void *data, u32 len)
 {
 	const unsigned int flags = FLOW_DISSECTOR_F_PARSE_1ST_FRAG;
 	const struct ethhdr *eth = (const struct ethhdr *)data;